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Properties and Structure of Atoms
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Explain: If 18 electrons fit on the third ring, why does K have 4 rings?
K is in the 4th period so it has 4 energy shells. 4s is lower in energy than 3d, so it will fill first.
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This principle states that electrons enter orbitals of lowest energy first.
Aufbau Principle
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All elements in the same GROUP have what in common?
Same number of valence electrons
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Write the electron configuration for sulfur
1s2 2s2 2p6 3s2 3p4
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How many protons does Chlorine (Cl) have?
17
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How many orbitals does an s orbital have?
1
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Why are atoms electrically neutral?
# positively charged particles (protons) = # negatively charged particles (electrons)
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Which principle or rule is violated?
Pauli Exclusion Principle
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What shape is a p orbital
dumbbell
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All elements in the same PERIOD have what in common?
Electrons in the same energy level (for s and p orbitals)
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What element matches this electron configuration?
Nitrogen
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How many orbitals are there in energy level 3?
s, p, d
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According to this principle, When electrons occupy orbitals of the same energy, electrons will enter empty orbitals first.
Hund's Rule
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What is WRONG with this electron configuration?
The 4s orbital is filled before the 3d orbital
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Hydrogen's Atomic number is 1. How many protons does it have?
1
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Electrons prefer to occupy the orbitals that require the most or least energy?
least
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How many electrons can fit on the 3rd energy level? Think of the Bohr Model Rules
18 e-
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Where p-block located? What color?
Green
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How many electrons does Chlorine (Cl) have?
17
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Which principle or rule is violated?
Hund's Rule
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What is the atomic mass of Silver?
108
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What is the atomic mass of Aluminum?
27
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What shape is an s orbital
spherical
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The number of protons in an atom is also known as the:
atomic number
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What is the Noble gas configuration for silicon?
[Ne] 3s2 3p2
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a d sublevel has how many orbital orientations?
5
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What element matches this electron configuration?
Calcium
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Why do elements in group 8 not form compounds?
They already have full outermost shell of electrons
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a p sublevel has how many orbitals
3
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How many types of orbitals are there in energy level 1 (n=1)
1s
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Energy is ____ when an electron moves from higher to lower energy level.
released
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What is the term for a negative ion?
Anion
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What shape is a d orbital
clover
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What term best describes the electrons on the outermost energy level?
Valence electrons
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Hydrogen's atomic number is 1. How many electrons does it have?
1
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What atom matches this electron configuration? 1s2 2s2 2p6 3s2
Magnesium
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What shape is an f orbital?
undefined
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How many neutrons does Potassium (K) have?
20
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Method of showing the arrangements of the electrons in an element or ion
electron configuration
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What does the term "isotope" mean?
Isotopes of a given element have the same number of protons but different numbers of neutrons in each atom
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Sublevel f has how many orbitals?
7
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What separates the metals from the nonmetals on the periodic table?
The metalloids (zigzag line)
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What element has 6 protons, 6 electrons, and 6 neutrons?
Carbon
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How many valence electrons do halogens have?
7
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What element has an atomic number of 4?
Beryllium
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How many types of orbitals are there in energy level 2?
s,p
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Energy is ____ when an electron moves from lower to higher energy level.
absorbed
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At a maximum, an f-orbital can hold_____ electrons, a d-orbital can hold_____ electrons and a p-orbital can hold ________ electrons.
14, 10, 6
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The number of protons and neutrons in the nucleus of the atom is known as the:
mass number
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State the relationship between wavelength, frequency and energy
the longer the wavelength, the smaller the frequency, the smaller the energy
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Where f-block located? What color?
Orange
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What is WRONG with this orbital diagram?
Every orbital must be filled with one electron before pairing
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Write the electron configuration for copper (Cu)
1s2 2s2 2p6 3s2 3p6 4s2 3d9
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What are shown on the Lewis dot diagrams?
valence electrons
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What shape is an s orbital
spherical
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What does the octet rule state?
The octet rule says that atoms are very stable when they have 8 electrons in their outer shell.
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Silver has two isotopes: Ag-107 and Ag-109. Their respective % abundances are 51.8% and 48.2%. Calculate the relative atomic mass of silver.
107.96 amu
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What electron configuration matches an oxygen atom?
1s2 2s2 2p4
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How many orbitals are there in energy level 4?
s, p, d, f
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